Removing black grease from a spark plug slot

How do I remove the those black deposits from a spark plug slot? Because I can't screw in the spark plug all the way in with the deposits blocking the path. I just changed all my spark plug yesterday and my car will just turned off by itself when I stop at a red light for a while, so I decided to check all my 6 spark plugs so I unplugged them all and only 1 spark plug has a lot of black greasy deposit so I get a new spark plug and plug in all my other spark plug and this slot with a lot of black deposit will not let my new spark plug go in any further than a few rotation with my socket wrech, other spark plug slot will allow me to do at least 10-15 rotation with socket wrench but this greasy deposited slot will only go around 5 rotation then I can't rotate my spark plug with my socket wrench anymore, so I unscrew the spark plug and poke a wood stick into the slot and I can feel a lot of deposit was in that slot while other slot was smooth going when I poke the wood stick in there. So how should I remove all that deposit from a sprk plug slot????? Please help.

Get a tap or thread chaser and turn it in. It should clear the threads out. I would blow as much out as possible so it doesn't rattle around in the cylinder.

How do I remove the those black deposits from a spark plug slot? Because I can't screw in the spark plug all the way in with the deposits blocking the path. I just changed all my spark plug yesterday and my car will just turned off by itself when I stop at a red light for a while, so I decided to check all my 6 spark plugs so I unplugged them all and only 1 spark plug has a lot of black greasy deposit so I get a new spark plug and plug in all my other spark plug and this slot with a lot of black deposit will not let my new spark plug go in any further than a few rotation with my socket wrech, other spark plug slot will allow me to do at least 10-15 rotation with socket wrench but this greasy deposited slot will only go around 5 rotation then I can't rotate my spark plug with my socket wrench anymore, so I unscrew the spark plug and poke a wood stick into the slot and I can feel a lot of deposit was in that slot while other slot was smooth going when I poke the wood stick in there. So how should I remove all that deposit from a sprk plug slot????? Please help.


as jr said they make a spark plug thread chaser... this will remove the carbon deposits on the threads then with the fuse pulled for fuel pump and plugs removed crank engine so as to blow out the crap from cylinder then reinstall plugs.... do this thread chasing to all and torque plugs to 15ft lbs..you want to disable fuel pump so no fuel will enter cylinder when blowing out debris......

I just bought a thread chaser and what I did was screwing it all the way in then unscrew it and then I screw in the spark plug and it'll fit all the way in, my car wasn't improving at all, how do I blow out the debris and carbon and stuff like that?

I just bought a thread chaser and what I did was screwing it all the way in then unscrew it and then I screw in the spark plug and it'll fit all the way in, my car wasn't improving at all, how do I blow out the debris and carbon and stuff like that?

hello! did you read my response on removal of the debris from combustion chamber??????

hello! did you read my response on removal of the debris from combustion chamber??????

Yes, but how do you blow it out???

Yes, but how do you blow it out???


" plugs removed crank engine so as to blow out the crap from cylinder then reinstall plugs " in other words the engine is the blowout device.........

hello! did you read my response on removal of the debris from combustion chamber??????
Okay.....:uhoh:
while other slot was smooth going when I poke the wood stick in there.
How about getting the rest of the stick out of there??? :rofl:
Maybe its just the bark in the threads....:lol: